采用电化学阳极氧化法在钛表面构筑了一种结构有序、微米级的TiO2纳米管阵列膜层.考察了制备电压、氧化时间、溶液搅拌等实验参数对TiO2纳米管阵列形貌和尺寸的影响.应用SEM和XRD对膜层的形貌和晶型进行了分析和表征,并通过TiO2纳米管阵列膜对甲基橙的光催化降解,研究了TiO2纳米管阵列膜层结构与光催化活性的关系.结果表明:阳极电压和溶液搅拌对制备TiO2纳米管阵列的结构起到关键的作用.控制20V电压制备的TiO2纳米管阵列膜,管长达2.6～3.3μm,经500℃热处理后具有最高的光催化活性,其光催化性能明显优于一般的TiO2纳米颗粒膜.A highly ordered titanium dioxide (TiO2) nanotube array film on titanium substrate was fabri- cated by using an electrochemical anodic oxidation method, and some preparation parameters of the TiO2 nanotube arrays were investigated as well. The SEM and XRD experiments were performed to characterize the morphology and crystalline phase of the TiO2 nanotube arrays. It was found that the morphology of the TiO2 nanotube arrays was greatly associated with the anodization voltage. The photocatalytic activity of the TiO2 nanotube array film was evaluated by the decolorization of methyl orange under the illumination of a high-pressure mercury lamp. The results showed that the TiO2 nanotube arrays prepared at 20 V and an- nealed at 500 ℃ exhibited the best photocatalytic activity to the degradation of methyl orange. And the photocatalytic activity of the TiO2 nanotube array film was much higher than that of the regular TiO2 nanoparticle film.国家自然科学基金(No.50571085);; 福建省科技项目(Nos.2005HZ01-3,2007H0031)资助项目
